H H O meteorologist (noun) mē-tē-urr-'o-luh-jist a scientist who studies weather The meteorologist said a storm was moving toward us. metric system (noun) 'me-trik 'sis-tem a system of weights and measures based on the meter The metric system is a system of weights and measures based on the meter. migrate (verb) 'mī-grāt to change habitat or location Birds migrate from one place to another. mist (noun) mist tiny water droplets in the air The waterfall creates a f ine mist. molecule (noun) 'mo-li-kyūl the smallest unit of a substance that has all its properties A water molecule has two hydrogen atoms and one oxygen atom. movement (noun) 'müv-ment a change in position or location The scientist records the movement of Venus. muddy (adjective) 'mu-dē being covered with or full of mud After it rains the ground becomes muddy. mystery (noun) 'mis-turrē something that is secret or unknown Scientists do not know why these trees are bent. It is a mystery. N narrow (adjective) 'nar-rō not wide Viking boats were long and narrow and could move quickly in the water. natural disaster (noun) 'na-tyur-ruhl di-'sas-turr a natural event that causes damage Hurricanes are a type of natural disaster with very strong winds. navigate (verb) 'na-vi-gāt to plan or control the course of something The sailors used the position of the Sun to navigate. 341 DICTIONARY meteorologist navigate
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